Factors affecting the quality and life of tarpaulin

Tarpaulin is a thicker cotton or linen fabric. It is named after its early use in sails. Generally, plain weave is used, and a small amount of twill weave is used. Multi-strand yarns are used for warp and weft yarns. Tarpaulin is now more and more widely used, today we will understand the factors that affect the quality and life of tarpaulin.

    1. Tear strength: The damage of the tarpaulin is mainly caused by tearing, so the tear strength is an important indicator of the tarpaulin. The tear strength is related to whether the tarpaulin will break due to the action of flying foreign objects or expand to the surroundings after forming a hole for some reason, forming a large structural crack. Therefore, when the tension is high. It is required not only to have high tensile strength, but also to have high tear strength.

    2. Water resistance: Water resistance is an important characteristic of tarpaulin. Through dipping and finishing, the vinyl chloride fat is filled in the gaps of the fabric tissue to form a coating film. If the amount of resin adhesion per unit area exceeds a certain level, water resistance is not a problem. If the coating film is thin, the coating film is easy to break when it is bent, rubbed or the surface is abraded, which may cause muddy water.

    3. Flame retardancy: From the perspective of safety in use, the tarpaulin is required to have good flame retardancy. Flame retardancy can be obtained by selecting flame-retardant fibers and flame-retardant base fabrics. It can also be achieved by adding flame retardant to the coating agent. The amount of flame retardant added is directly related to the flame retardant effect.

    4. Air permeability: Consider the air permeability of tarpaulin, especially military tent cloth. The influencing factors of air permeability include base fabric structure, density, material, type of waterproof finishing agent, resin adhesion, etc. As the amount of resin adhesion increases, the air permeability of the tarpaulin decreases. Of course this is related to the finishing agent used. Generally, most air-permeable tents are made of cotton, vinylon, lacquer and other short-woven fabrics finished with paraffin wax or acrylonitrile resin.

    5. Tensile strength: The tarpaulin must bear various tensions when in use, such as when it is tightened, it will be subjected to tension: during use, it will be subjected to additional forces such as wind, rain and saving. Despite these external forces, they are still required to maintain their original shape and not easily deform. This requires the tarp to have a higher tensile strength, and there should not be too much difference in tensile strength in the warp and weft directions. In particular, the tensile strength of large tents for inflatable buildings is extremely important. Generally, the base fabric is made of high-strength polyester, vinylon and other long-fiber fabrics. Waterproof finishing with vinyl chloride resin and chlorosulfonylated polyethylene resin. The strength of the product is mainly determined by the strength of the fiber material and the density of the fabric.

    6. Retraction stability is also called elongation and dimensional stability: as eaves tents and large tents, it is often used under tension. The elongation of the fabric should not be too large, and its dimensional stability is determined by the creep characteristics of the material.

    Of course, not all tarpaulins need to have all of the above elements, and the detection indicators are different according to the type and functionalization of the use.